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-rw-r--r--lib/kernel/src/os.erl20
1 files changed, 15 insertions, 5 deletions
diff --git a/lib/kernel/src/os.erl b/lib/kernel/src/os.erl
index 3d308a43b0..3647545777 100644
--- a/lib/kernel/src/os.erl
+++ b/lib/kernel/src/os.erl
@@ -26,7 +26,7 @@
%%% BIFs
--export([getenv/0, getenv/1, getpid/0, putenv/2, system_time/0, system_time/1,
+-export([getenv/0, getenv/1, getenv/2, getpid/0, putenv/2, system_time/0, system_time/1,
timestamp/0, unsetenv/1]).
-spec getenv() -> [string()].
@@ -40,6 +40,19 @@ getenv() -> erlang:nif_error(undef).
getenv(_) ->
erlang:nif_error(undef).
+-spec getenv(VarName, DefaultValue) -> Value when
+ VarName :: string(),
+ DefaultValue :: string(),
+ Value :: string().
+
+getenv(VarName, DefaultValue) ->
+ case os:getenv(VarName) of
+ false ->
+ DefaultValue;
+ Value ->
+ Value
+ end.
+
-spec getpid() -> Value when
Value :: string().
@@ -97,10 +110,7 @@ version() ->
Name :: string(),
Filename :: string().
find_executable(Name) ->
- case os:getenv("PATH") of
- false -> find_executable(Name, []);
- Path -> find_executable(Name, Path)
- end.
+ find_executable(Name, os:getenv("PATH", "")).
-spec find_executable(Name, Path) -> Filename | 'false' when
Name :: string(),